Read this once in your own voice. It saves on this phone and plays back at any speed.
1.0×speed
These are the voices built into your phone. Google's "en-US" voices with the letter codes are the natural-sounding ones; tap Try to hear each. Male voices are listed first when the phone labels them.
1.0pitch
Your library syncs between your phone and computer through your Google account. Recordings of your own voice stay on the device you recorded them on.